1 /*
2 * Copyright 2004 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #ifndef RTC_BASE_STRING_UTILS_H_
12 #define RTC_BASE_STRING_UTILS_H_
13
14 #include <ctype.h>
15 #include <stdarg.h>
16 #include <stdio.h>
17 #include <string.h>
18
19 #if defined(WEBRTC_WIN)
20 #include <malloc.h>
21 #include <wchar.h>
22 #include <windows.h>
23
24 #endif // WEBRTC_WIN
25
26 #if defined(WEBRTC_POSIX)
27 #include <stdlib.h>
28 #include <strings.h>
29 #endif // WEBRTC_POSIX
30
31 #include <string>
32
33 namespace rtc {
34
35 const size_t SIZE_UNKNOWN = static_cast<size_t>(-1);
36
37 // Safe version of strncpy that always nul-terminate.
38 size_t strcpyn(char* buffer,
39 size_t buflen,
40 const char* source,
41 size_t srclen = SIZE_UNKNOWN);
42
43 ///////////////////////////////////////////////////////////////////////////////
44 // UTF helpers (Windows only)
45 ///////////////////////////////////////////////////////////////////////////////
46
47 #if defined(WEBRTC_WIN)
48
ToUtf16(const char * utf8,size_t len)49 inline std::wstring ToUtf16(const char* utf8, size_t len) {
50 if (len == 0)
51 return std::wstring();
52 int len16 = ::MultiByteToWideChar(CP_UTF8, 0, utf8, static_cast<int>(len),
53 nullptr, 0);
54 std::wstring ws(len16, 0);
55 ::MultiByteToWideChar(CP_UTF8, 0, utf8, static_cast<int>(len), &*ws.begin(),
56 len16);
57 return ws;
58 }
59
ToUtf16(const std::string & str)60 inline std::wstring ToUtf16(const std::string& str) {
61 return ToUtf16(str.data(), str.length());
62 }
63
ToUtf8(const wchar_t * wide,size_t len)64 inline std::string ToUtf8(const wchar_t* wide, size_t len) {
65 if (len == 0)
66 return std::string();
67 int len8 = ::WideCharToMultiByte(CP_UTF8, 0, wide, static_cast<int>(len),
68 nullptr, 0, nullptr, nullptr);
69 std::string ns(len8, 0);
70 ::WideCharToMultiByte(CP_UTF8, 0, wide, static_cast<int>(len), &*ns.begin(),
71 len8, nullptr, nullptr);
72 return ns;
73 }
74
ToUtf8(const wchar_t * wide)75 inline std::string ToUtf8(const wchar_t* wide) {
76 return ToUtf8(wide, wcslen(wide));
77 }
78
ToUtf8(const std::wstring & wstr)79 inline std::string ToUtf8(const std::wstring& wstr) {
80 return ToUtf8(wstr.data(), wstr.length());
81 }
82
83 #endif // WEBRTC_WIN
84
85 // Remove leading and trailing whitespaces.
86 std::string string_trim(const std::string& s);
87
88 // TODO(jonasolsson): replace with absl::Hex when that becomes available.
89 std::string ToHex(const int i);
90
91 std::string LeftPad(char padding, unsigned length, std::string s);
92
93 } // namespace rtc
94
95 #endif // RTC_BASE_STRING_UTILS_H_
96